How Altitude and Pressure Affect Your Multi-Pump Gun
Did you know that altitude and pressure will affect your pump gun? Airgun manufacturers will typically impose a one to 10 time pumping maximum on their multi-pump airguns based on standard day conditions and maximum valve pressure. The pump limit is meant to preserve seals, reduce wear and tear and prevent valve lock. It’s a guide, but not necessarily an absolute.
When the air is thin, multi-pumps have little to compress and therefore get weaker at higher altitudes. There is less air for them to compress and store. That can be offset by pumping more to compensate. For instance, if you live in a mountain state and have an Umarex Next Generation APX or Daisy 880 for instance, you may have to pump 12 to 15 times to achieve the same velocity that 10 pumps produces on a normal day at sea level. On the flip side, if you’re in Death Valley on a winter night just seven or eight pumps might suffice for the same velocity achievable at sea level with 10 pumps.
Pump Guns are the Most Useful of Airguns
Pump guns are the most useful of airguns. Why? You can adjust the pressure at any altitude or temperature to achieve the same velocity without any extra gear just by altering the number of pumps. Pneumatic pump guns don’t require CO2, which is affected by temperature and you don’t have to worry about density altitude like in fixed volume break barrel spring rifles.
Always Use Caution with Pump Guns
Whether you pump just one or two times or experiment to find out how many pumps your gun takes to reach its maximum velocity where you live, be aware that just one pump will send a projectile flying at dangerous speeds. One or two pumps can cause serious injury or property damage. No matter how many times you might pump your airgun, ALWAYS keep the muzzle pointed in a safe direction. Don’t aim or point the gun at anything other than a target or object intended to be used as a target.
by Chip Coone
Chip Coone is a writer for Umarex USA, Inc. The writings of Chip Coone are not representative of Umarex USA, Inc. or its affiliates or parent companies and are the opinion or reflection of Chip Coone.
Why Overlooking Eye Protection is a Huge Mistake for Airgunners
So, you’ve finally got some time to get out your new Umarex airgun. It’s time to engage targets and experience some instant gratification while you take stress out on unsuspecting objects. You have your airgun, your pellets and bag full of stuff to shoot at. You’re ready for whatever gets placed in front of you. Or are you? One of your biggest risks as an airgunner isn’t lead poisoning as some might believe; it’s actually your body’s most vulnerable tissue at risk – your eyes.
Your eyes are a big weak spot, and protecting them is something that you might overlook if you’re anxious to pull the trigger. You’d be wise to cover your eyes given all of the dangers a range can dish out, whether airgunning in your backyard or at a public or private gun range. Consider that unexpected ricochets and even debris stirred up by wind at the wrong moment can temporarily blind you. The potential of a ricochet is dangerous enough; shooting blind, well, you’ll probably have to quit the sport and you don’t want that to happen.
There are a lot of options for eye protection and different airgunners will find the various styles and features more comfortable than others. The best eye pro will stop debris, wind, and glare, while also protecting your eyes from UV rays. Lens color is also something to consider not just for clarity in certain light conditions, but also for comfort. For instance, yellow lenses on a bright sunny day may be too bright—they’re intended for cloudy days or low light conditions.
The bottom line is: wear eye protection and take the time to find good quality eye pro that’s comfortable to wear and suitable for your shooting conditions.
1. Do not dry fire spring air guns.
Do not fire your spring-powered air rifle or pistol without a pellet or two felt cleaning pellets in the chamber.
2. Do not over-adjust the trigger.
Over-adjusting could render the air gun inoperable.
3. Clean the bore of your air guns.
Get more spring airgun maintenance tips.
4. Use the correct lubrication on your air guns.
WD40 and 3-in-1 oils are NOT suitable. Use RWS lubes or similar high grade lubricants designed for air guns.
5. Always check for loose screws and parts before, during, and after shooting.
This ensures consistent performance and is a good practice for any mechanical system.
6. Always place one drop of airgun oil on the tip of the CO2 capsule before installing.
Click here to see more tips about using CO2 with airguns.
7. When using Rotary Magazines with Umarex pistols, make sure the pellet is seated properly.
Do not use conical (pointed) pellets. Pellets should not stick out past the rotary magazine’s surface.
8. Hold spring air rifles loosely.
Holding a spring air rifle too tightly will reduce accuracy and could damage the gun.
9. Don’t be forceful when returning cocking levers to their closed position.
Forcing a lever closed will bend the cocking lever. Under- and side-lever air rifles have a release button.
This article of shooting tips for improving your accuracy was originally written for RWS guns, but applies to all spring piston air guns.
- Be patient as you break in your new gun. Spring piston airguns typically require 500-1,000 shots to break in properly. Groups may be erratic for the first 100+ shots.
- DO NOT bench rest on ANY solid objects! NO part of the gun should rest on a rigid surface or object.
- Stabilize your shooting surface. Utilize sand bags, pillows, or folded quilts as a shooting surface. This helps stabilize the gun so that you can verify the gun’s accuracy instead of the gun & shooter combined.
- Protect your gun barrel. The gun barrel is NEVER to rest on any surface when shooting.
- Position the gun so that it is resting and pointing at a specific target point without being held. You can then ease into the shooting position without changing sight picture. By taking out as much of the “human factor” of holding the gun, your accuracy will most likely improve.
- SQUEEZE the trigger – pulling the trigger or jerking the trigger will result in terrible accuracy.
- Make sure to follow-through for every shot. Try not to blink when the gun fires and continue to focus on the precise point of aim.
- Always hold the gun “loosely” at the forearm and in the shoulder. Spring guns usually become inaccurate when held tightly.
- Use a consistent position & grip. Changing your shooting position or grip can and will affect your point of impact.
- Become familiar with your rifle and your ammo. Each rifle is individual and has its own characteristics. To achieve the best performance, you should try an RWS Pellet Sampler pack of pellets to see which ammo your gun shoots the most accurately.
- Don’t use junk ammo. Use only high quality pellets in your rifle, such as the RWS line of pellets. They are much cleaner and manufactured to more exacting tolerances.
- Never dry fire a spring gun. Dry firing your spring rifle can damage your gun.
Many competent air rifle fans are aware of these rules. How many do you think consistently follow all of them?
by: Glenn and Danny
Editor’s Note: This articles comes directly from gunsmiths who work at Umarex USA.
Whenever we get into a discussion with someone about rifle scopes, inevitably the subject of parallax arises. Scope parallax confuses a lot of people, and there is a great deal of misunderstanding on the subject.
First things first; the term “parallax” is used to describe the difference in angles between objects that are seen up close and those seen far away. When you are driving and look at telephone poles pass by on the side of the road, those closest to your car seem to pass very fast, while the ones far away seem to go very slow. That difference is due to parallax.
In general, it is wise to keep the old phrase in mind, “The better you can see your sights and your target, the more accurately you will shoot.” However, that phrase is only true as long as your sights are pointing in the same place from one shot to the next. Telescopic sights allow you to see much further distances, but they create new sighting problems with rifles that never were a problem in the old iron-sighting days.
A scope with parallax issues can wreak havoc on a person’s air rifle accuracy as well as sanity! We see this issue frustrate people to no end time and time again in our service and gunsmith departments. If you don’t know what’s going on and how to check for this problem then you could be wasting hours at the range trying to figure out what is causing the “accuracy” problem.
Many modern day airgun scopes have an adjustable objective (AO) feature, which is located at the forward end of the scope or the turret. There will be an adjustment ring with yardage numbers that can be rotated to coincide with the distance at which you are shooting.
If you are suspicious that there may be parallax issues with a scope then place the gun in a solid rest that totally supports the gun without you holding it. Place a target at a known distance and set the AO ring to coincide with that particular distance. Adjust the gun rest so that the crosshairs are centered on the bull’s-eye.
Adjust a gun while on a solid “hands free” rest to correct for parallax.
Now, move your head left and right about 1” in each direction. The crosshairs should remain centered on the bull’s-eye as you move your head left and right. If the crosshairs are wandering off the bull’s-eye then there is an issue with the parallax at that distance for that scope when you are shooting it.
It should be noted that distances marked on the scope are not necessarily written in stone. A person’s own optics of their eye comes in to play for a certain scope at a certain distance. Some scopes do not put markings on the scopes for this very reason, instead saying to use the test (above) to find the point of zero parallax error for each distance and then use a silver or white paint pen to mark the positions. If you do notice an issue with parallax on your gun, you can try rotating the AO incrementally to see if the parallax issue can be eliminated, and then noting the position that the AO is in for that distance. If you are unable to eliminate the parallax, then we suggest replacing the scope with another one.
The parallax issue is a critical one for hunters and target shooters. The crosshair remaining centered on the bull’s-eye when moving your head left and right is of utmost importance. The reason being…if you didn’t position your cheek at the exact same spot on the stock each time you are shooting then it would be like moving the rear sight, which of course changes your point of impact. By its very nature, parallax is more of an issue at close distances and becomes less of one the further out one aims. Because air rifles are usually aimed at much closer distances than firearms, parallax can be much more of an issue among air rifle shooters.
So, if you find yourself becoming increasingly frustrated with sighting in your rifle, look at parallax as an issue that might need to be eliminated.
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